Threaded nut for a ball screw drive

Abstract

A threaded nut for a ball screw drive is provided. The threaded nut includes a cylindrical central piece ending at a flange. A deflecting body is attached to the cylindrical central piece and is configured to recirculate balls during operation of the threaded nut. A pin fixes the deflecting body to the flange. In embodiments, the flange and the deflecting body each have recesses that are aligned with one another, and the pin extends through those recesses.

The invention claimed is: 
     
       1. A threaded nut for a ball screw drive, the threaded nut having a deflecting body and a single-piece comprising a central piece and a flange arranged at a first end of the central piece, wherein the deflecting body is spring mounted on the central piece, arranged between the first end and a second end of the central piece, and is configured for recirculation of balls, wherein the flange is aligned and is directly in contact with an outer surface of a front side of the deflecting body,
 a pin having spring section, the pin fixes the deflecting body to the central piece, wherein the pin is inserted in a recess of the flange and a recess of the deflecting body which are mutually aligned. 
 
     
     
       2. The threaded nut according to  claim 1 , wherein the recesses are designed as bores in the flange as well as in the deflecting body. 
     
     
       3. The threaded nut according to  claim 1 , wherein the recess of the deflecting body is configured as a groove in the deflecting body such that the groove is open to a lateral surface of the deflecting body. 
     
     
       4. The threaded nut according to  claim 3 , wherein the recess of the flange is a bore in the flange, and wherein the front side of the deflecting body has a notch located radially inward of the groove, wherein the notch has an enlarged cross-section in comparison to the groove. 
     
     
       5. The threaded nut according to  claim 4 , wherein the recess in the deflecting body is shaped at least partially conically. 
     
     
       6. The threaded nut according to  claim 1 , wherein the pin is a parallel-grooved pin. 
     
     
       7. The threaded nut according to  claim 1 , wherein the deflecting body has a second front side with a second recess of the deflecting body shaped similarly as the recess of the deflecting body on the front side. 
     
     
       8. The threaded nut according to  claim 7 , wherein on each front side of the deflecting body precisely one pin is inserted into the deflecting body. 
     
     
       9. The threaded nut according to  claim 1 , wherein a pulley is molded on the front side of the central piece opposite the flange. 
     
     
       10. The threaded nut according to  claim 1 , wherein the central piece is encompassed by the deflecting body and additional deflecting bodies, which contact in a circumferential direction of the central piece in a connectionless manner. 
     
     
       11. A threaded nut for a ball screw drive, the threaded nut comprising:
 a single-piece comprising a central piece having a cylindrical surface and a flange extending radially outwardly from a first end of the cylindrical surface, wherein the flange has a first recess; 
 a deflecting body attached to outer surface of the cylindrical surface between the first end and a second end of the cylindrical surface and configured to recirculate balls during operation of the threaded nut, wherein the deflecting body has a second recess aligned with the first recess; and 
 a pin extending through the first and second recesses wherein the pin fixes the deflecting body to the central piece, 
 wherein;
 the flange is in direct contact with an outer surface of a front side of the deflecting body, and 
 the second recess is a groove open to a lateral surface of the deflecting body. 
 
 
     
     
       12. The threaded nut of  claim 11 , wherein the first recess is a bore. 
     
     
       13. The threaded nut of  claim 11 , wherein the deflecting body has a notch located radially inward of the groove, wherein the notch has an enlarged cross-section compared to the groove. 
     
     
       14. The threaded nut of  claim 11 , wherein the groove is shaped at least partially conically. 
     
     
       15. The threaded nut of  claim 11 , wherein the pin is a parallel-grooved pin. 
     
     
       16. A threaded nut for a ball screw drive, the threaded nut comprising:
 a central piece having a flange arranged at a first end of the central piece, the flange and central piece constructed from a single piece; 
 a first deflecting body; and 
 a second deflecting body; and 
 the first and second deflecting bodies:
 attached on the central piece; 
 arranged between a first end and a second end of the central piece; 
 extending circumferentially around the central piece; 
 configured for recirculation of balls; and 
 the flange is aligned with an outer surface of a front side of each of the first and second deflecting bodies; and 
 
 a first pin:
 configured to fix the first deflecting body to the central piece; and 
 inserted in a recess of the flange and a recess of the first deflecting body; and 
 
 a second pin:
 configured to fix the second deflecting body to the central piece; and 
 inserted in a recess of the flange and a recess of the second deflecting body; and 
 
 the first and second deflecting bodies configured to abut each other in a circumferential direction without being coupled to each other in a circumferential direction. 
 
     
     
       17. The threaded nut according to  claim 16 , wherein the first and second pins are parallel-grooved pins.